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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 40 (1970)No. 1. (March), Pages 428-434

Vertical Sheet Structures--A New Indicator of Sedimentary Fabric: NOTES

M. G. Laird (2)

ABSTRACT

Vertical or subvertical sheet-like structures occurring in a turbidite sequence are shown to be developed parallel to the direction of preferred orientation of the long axes of grains. They are interpreted as reflecting primary sedimentary fabric, and can be used as paleocurrent indicators. The sheets are thought to represent a matrix-deficient residue of larger grains formed in the upwelling portions of convection cells initiated by differential settling of grains during deposition of a bed. They may thus provide evidence of deposition from suspension of the sedimentary unit in which they occur.


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